water situation

Summary of the water volume and mitigation measures in Rayong and Chonburi Provinces for 2023 On 17th November 2023 20/11/66

1

Overview of water situation in Rayong-Chonburi area on 17th Nov 2023 P2

P3 P4

Private Pond

Chonburi

Detail

P1

Reservoir capacity (MCM) (Temporary increase) Current storage volume 17.00 (MCM) on 17 Nov 2023 Percentage of reservoir capacity Samnakbok Useable storage volume Reserve Pond (excluding Dead Storage) (MCM) P5

BangPhra

Nong Kho

Dokkrai

Nong Pla Lai

Klong Yai

117.00

21.40

71.40 (79.41)

163.75 (187.62)

40.10 295.00 (51.10)

85.68

11.01

57.11

164.95

32.13

279.05

73%

51%

80%

101%

80%

94.6%

73.63

10.01

54.11

151.45

29.13

259.05

0.213

0.392

0.226

Inflow into reservoir (MCM) (On 16 Nov 2023)

85.68

Bang Phra res.

P6

11.01

Nong Kho res.

P7

48.00

Water volume compared to previous week (-decrease, +increase) (MCM) Total water volume in each area

38.00

+2.68

32.13

Dok Krai res. P12

P8

P11

P9

Prasae

0.00

0.830 +0.09

+1.15

+4.05

+0.09 -4.72

+2.77

+5.29

96.69 MCM (69.9%)

254.18 MCM (92.35%)

Ref: water situation from RID on 17 Nov 2023

279.05 Prasae res.

Khlong Yai res.

Nong Pla164.95 Lai res.

57.11

P

P15

P10

Normal 50.01-80.00% Emergency 30.01-50.00%

Critical <30.00% XX Demand 2023 (MCM.)

XX XX

P13

156.60

Rayong

Supply (MCM.) Pump Station

Raw Water Pipe Line (EW) P14

Existing Pipe Network Constructing Pipe Network

Raw Water Pipe Line (RID) Existing Pipe Network Constructing Pipe Network

Water situation of Bangphra, Nongkho Reservoir Water volume in Bangphra and Nongkho Reservoirs (MCM.)

Water Situation of Bangphra and Nongkho Reservoirs

170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0

Maximum 2006-2022 2016 2020 URC - RID 2022

2004 2017 2021 LRC - RID

2015 2019 Dead storage 2023

17 Nov 2023 96.69 MCM. 69.86 %

Maximum 2006-2022

160

2005 2018 Capacity Average 2006-2022

140

2 Reservoirs total capacity 138.4 MCM.

120

2022

URC - RID

Average 2006-2022

2023

100

1

80

60

40

20

LRC - RID

Minimum reservoir volume 13.05 MCM. 0

20/11/66

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec 3

Water situation of Bangphra Reservoir (by Year)

Water volume in Bangphra Reservoir (MCM.)

Water Situation of Bangphra Reservoir 2004 2015 2020 URC - RID 2023

150 140

2005 2016 2021 LRC - RID

2006 2018 Capacity Average 2006-2022

2011 2019 Dead storage 2023

URC - RID

17 Nov 2023 85.68 MCM. 73.23 %

140

Average 2006-2022

130 120

120

Reservoir Capacity

MCM.

110 100

100

80

2022

2023

90 80

70 60

60

50 40

40

30 20

20

10 0

Minimum reservoir volume

.05 MCM.

Jan

Apr

LRC - RID

0

20/11/66

Feb

Mar

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec 4

Water situation of Nongkho Reservoir (by Year)

Water volume in Nongkho Reservoir (MCM.)

Water Situation of Nongkho Reservoir 2004 2016 2021 URC - RID 2023

26

2005 2018 Capacity LRC - RID

24

20

2015 2020 Normal useable volume 2023

URC - RID

17 Nov 2023 11.01 MCM. 51.47 %

25

22

2011 2019 Dead storage Average 2006-2022

Reservoir Capacity

.4 MCM. 2022

20

Average 2006-2022

2023

18

16 15

14 12

10

10

8 6 5

4 Normal useable volume MCM. Minimum reservoir volume MCM.

2 0

LRC - RID

0

20/11/66

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec 5

Water situation of Nongplalai, Dokkrai and Klongyai Reservoirs

Water volume in Dokkrai Nongplalai and Klongyai Reservoirs (MCM.)

Water Situation of Dokkrai Nongplalai and Klongyai Reservoirs

380 360 340 320 300 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0

Maximum 2006-2022 2015 2019 Minimum volume LRC - RID

2004 2016 2020 Dead storage Average 2006-2022

2014 2018 Capacity URC - RID 2023

URC - RID

17 Nov 2023 254.18 MCM. 92.35 %

Maximum 2006-2022 Average 2006-2022

350

2005 2017 2021 Increased Capacity 2023

1

Increased reservoir capacity (temporary) 318.13 MCM. 300

2023

3 reservoirs total capacity

.25 MCM.

250

2022 200

150

100

50

Minimum reservoir volume

Dead storage 0

1

31

Jan

.5 MCM. 1

Feb

MCM. LRC - RID

31

Mar

30

Apr

30

May

29

Jun

29

Jul

28

Aug

27

Sep

27

Oct

26

Nov

26

Dec

Water situation of Dokkrai Reservoir (by Year) Water Situation of Dokkrai Reservoir 2004 2014 2018 Capacity LRC - RID

100

Water volume in Dokkrai Reservoir (MCM.)

100

90

90

80

80

70

70

60

60

50

50

40

40

30

30

20

20

10

10

2005 2015 2019 Dead storage Average 2006-2022

Average 2006-2022

2006 2016 2020 Increased Capacity 2023

2011 2017 2021 URC - RID 2023

URC - RID

17 Nov 2023 57.11 MCM. 79.98 %

Increased reservoir capacity (temporary) 79.41 MCM. 2023

0

2022

Reservoir Capacity 71.4 MCM.

Minimum reservoir volume

MCM.

Jan

Apr

LRC- RID

0

20/11/66

Feb

Mar

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec 7

Water situation of Nongplalai Reservoir (by Year)

Water volume in Nongplalai Reservoir (MCM.)

Water Situation of Nongplalai Reservoir 2004 2014 2018 Capacity LRC - RID

220

2005 2015 2019 Dead storage Average 2006-2022

Average 2006-2022

180

Increased reservoir capacity (temporary) 187.62 MCM. 2023

2011 2017 2021 URC - RID 2023

URC - RID

17 Nov 2023 164.95 MCM. 100.73 %

200

200

2006 2016 2020 Increased Capacity 2023

Reservoir Capacity

.75 MCM.

160 150

2022

140 120 100

100

80 60 50

40 20

0

Minimum reservoir volume

.5 MCM. LRC - RID

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Water situation of Klongyai Reservoir (by Year)

Water volume in Klongyai Reservoir (MCM.)

Water Situation of Klongyai Reservoir 2006 2016 2020 Increased Capacity Average 2006-2022

55 50

Increased reservoir capacity (temporary) Reservoir Capacity

2014 2018 Capacity URC - RID 2023

2015 2019 Dead storage LRC - RID

URC - RID

17 Nov 2023 32.13 MCM. 80.12 %

Average 2006-2022

50

45 40

2011 2017 2021 Lowest of tunnel 2023

.465 MCM.

.1 MCM.

40

2023

35 30

2022 30

25 20

20

Lowest water level that can be transferred through tunnel to Nongplalai Reservoir

15

10

.2 MCM.

Minimum reservoir volume .5 MCM.

10

5

0

LRC - RID 0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Water situation of Prasae Reservoir

Water volume in Prasae Reservoir (MCM.)

Water Situation of Prasae Reservoir

360 340 320 300 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0

Maximum 2006-2022

2005

2006

2015

2016

2017

2019

2020

2021

Capacity

Dead storage

URC - RID

LRC - RID

Average 2006-2022

2023

2023

350

Maximum 2006-2022 Average 2006-2022

300

250

Reservoir Capacity

URC - RID

17 Nov 2023 279.05 MCM. 94.59 %

MCM.

2023

2022

200

150

100

50

Minimum reservoir volume

MCM. LRC - RID

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Summary of water shortage prevention and mitigation measures in Rayong and Chonburi Provinces 2023 Planned Water Volume (MCM) 2023

Measure JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Total

7.50

7.80

7.80

7.80

7.80

7.80

8.06

54.00

0.25

0.25

0.25

0.25

5.00

7.50

6.88

29.68

1. Primary measures

1.1Water diversion via pumping from Prasae Reservoir * Divert water to irrigation

area during Feb until May 2023

1.2 Divert Water from Bangpakong River + Private Pond

Planned PS - KY Planned PS- NPL PS-KY*

1.55

1.40

3.10

3.00

0.25

Actual PS-NPL

0.39 0.39 1.40 1.42 0.33 0.35 0.38 0.33 0.39

Planned Private Pond

1.83

1.60

1.92

0.74

1.74

1.19

Planned

0.84

13.32

6.99

7.49

3.81

2 Aug

1.17 1.88 1.17 2.62 2.62 1.60 0.03

10.95 25.16

11.93 16 Nov 3.57

24.83

5.00 10.00 10.00 14.00 11.00

50.00

10 Oct 2.87 0.00

7.94

Planned

14.00 14.00 14.00 14.00

56.00

Actual

5.17 15.37 11.57 12.43 8.59

6.51

Bangpakong

Planned 1.3 Klong Saphan reverse KlongSaphan

Actual KlongSaphan

1.4 Divert Water from Klong Pra Ong Chaiyanuchit

16 Nov 5.60 3.32

0.89 6.87

Actual

pumping station

75.92

1.04

Bangpakong

Actual Private Pond

16 Nov 4.48

7.06 2.92 8.82 6.62 3.95 8.48 9.03 8.92 8.09 8.91

0.51

0.48

1.61

0.00

7.80

2.47

8.36

16 Nov

49.4

Target Line and Reservoir Simulation in Chonburi

On 17 Nov 2023 Water Volume 121.80 MCM

155

Normal Status (All Clear) Prepare water reserve 130

155

•

•

Water shortage warning Minimum storage volume15.05 MCM.

Prepare water reserve 130

•

Surveillance of water scarcity

Normal Status (All Clear)

• •

Divert water from Bang Pa Kong River and Pra Ong Chaiyanuchit (diversion will according to the water situation) Increase water diversion from Rayong (diversion will according to the water situation)

Divert Water from Khlong Luang Ratchalothorn reservoir (diversion will according to the water situation) Consideration for another private pond Reduce water usage for various activities

155

Target Line and Reservoir Simulation in Rayong

Increase reservoir capacity for temporary 318.13 MCM.

Normal Status (All Clear)

On 17 Nov 2023 Water Volume 254.18 MCM or 92.35%

230 Prepare water reserve

220 170

Normal Status (All Clear) 220 170

• •

Surveillance of water scarcity •

Water shortage warning

(Temporary capacity 79.90%)

• •

Divert water from Prasae reservoir via Prasae-Klong Yai pipeline and PrasaeNong Pla Lai pipeline (diversion will according to the water situation) Divert water from Wat La Harn Rai to Nong Pla Lai reservoir (diversion will according to the water situation) Divert water from Prasae reservoir via Prasae-Klong Yai pipeline and Prasae-Nong Pla Lai pipeline (Full efficiency) Divert water from Wat La Harn Rai to Nong Pla Lai reservoir (Full efficiency) Reduce water consumption for all activities

Minimum storage volume 31.70 MCM. 20/11/66

13

Target Line and Reservoir Simulation in Prasae

On 17 Nov 2023 Water Volume 279.05 MCM or 94.9%

Storage Volume 295.0 MCM

Normal Status (All Clear) 250 Prepare water reserve

• •

Surveillance of water scarcity

Water shortage warning Minimum storage volume 20.0 MCM.

•

250

Normal Status (All Clear) Prepare water reserve

Divert water from Khlong Saphan canal to Prasae reservoir (diversion will according to the water situation) Divert water from Wang Ta Nod canal to Prasae reservoir (diversion will according to the water situation) decrease divert water from Prasae reservoir (diversion will according to the water situation)

• Reduce water consumption for all activities

250

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